Lock for windows.



PATENTBD NOV. 24, 1903; H. F. WOODARD 6v B. J. DOLPHIN.

LOCK FOR WINDOWSn APPLICATION FILED DEQ. 1a. 1902.

N0 MODEL.

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PATENTED Nov. 24,1903. E. F. WooDARD & B. J. DOLPHIN.

LOCK FOR WINDOWS.

APPLIOATION FILED DB0. 1a, 1902.

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Moro-mno.. msnmowu n c NITED STATES `Fatented November 24, 1903.

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HARTSON F.- WOODVARD AND BYRON J. DOLPHIN, OF MINNEAPOLIS,

' MINNESOTA.-

LOCK FOR WlNDOWS.

SPECIFICATION forming part of Letters Patent No. 744,848, dated November 24, 1903. Application filed Decemherl, 1902. Serial No. 135.675. (No model.)

y clare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled inthe art to which it ap pertains to make and use the same.

This invention has for its object to provide an improved lock for windows adapted to automatically lock the upper sash whenever it is movedV upward to a closed position or to lock the lower sash whenever it is moved downward to a closed position and which lock cannot be opened by a burglar or other per son from the outer side of the window.

To the above ends the invention consists of the novel devices and combinations of devices hereinafter defined and described in the claims.

Ordinary window-locks which usually lock together the upper and lower window-sashes have been very frequently opened by burglars by the use of a thin liat blade or similar instruments, and, furthermore, it is a very common thing that the lockingof the windows by such devices has been overlooked or forgotten at times when the windows shouldbe locked as a protection against burglars.

In Vaccordance with this invention the window-locks are made automatic, so that whenever the window is closed it is certain to be locked. At the same time these locks may be very readily released by manipulation from the inner side of the window, so that the window may be opened with the same ease approximately as at present.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure l is a front elevation looking at the inner side of a window having the improved lock applied thereto, some parts being broken away. Fig. 2 is a side elevation of the window shown in Fig. l, some parts being sectioned. Fig. 3 is a vertical section on the line :c3 m3 of Fig. 2, but with the Window-sash shown in full and with some parts broken away; and Fig. et is a detail with some parts broken away, showing a portion ofthe upper sash looking at the same from one side of the window.

The numeral l indicates the complete window-frame, and the numerals 2 and 3 indicate, respectively, the upper and lower sash, which are movable in said frame in the ordinary way, being preferably counterbalanced by the ordinary counterbalancing-Weights and connections 4.

The upper sash 2 is provided at one side with a notched detent or hook-like metallic nger 5, which works upward through a perforation 1n in the top of the frame, as best shown in Fig. 3. At the same side of the window the lower sash 3 is provided With a similar detent or hook-like finger 6, which works through a perforation 1b in the lower portion of the window-frame, as also best shown in Fig. 3.

A locking-spring 7, preferably formed of flat spring-steel, is secured at one end to the top of the window-frame, and its free end cooperates with the notched end of the detent or linger 5 of the upper sash to lock the said upper sash in its closed position. A similar locking-spring 8 cooperates with the notched end of the depending detent or finger 6 of the lower sash,the upperendof this locking-spring being rigidly secured to thelower portion of the window-frame. Both of the springs 7 and 8 are incased or inclosed by the sides ot' the window-frame or, in other words, by the .Gasings thereof, so that direct access thereto cannot be had without removing parts of the window-frame, and even this of course cannot be done from the outer side of the window.

With the construction above described it is evident that when the Window-sashes are forced into their closed position' the projecting ends of their detents or fingers will press laterally the cooperating locking-springs, and the said locking-sprin gs when'the sashes have been moved completely to their closed positions spring into engagement with the notches or hooked ends'of the detents, and thus automatically lock the sashes. To release the sashes, the locking-springs must be sprung laterally out of engagement with their coperatin g detents, and this is best accomplished IOCr by a novel releasing device, which will next be described.

At one side of the frame, preferably the right-hand side thereof as viewed from the interior, is areleasing-lever 9, which vis pivoted about half-way up on the inner windowcasing, as best shown in Fig. 1, but also in Fig. 2. beyond the casing of the window-frame, so that it may be easily reached and engaged by the lingers. To each right-hand corner of the frame 1, between the casings thereof, is pivoted a bell-crank 10, one arm of which is connected to the lever 9 by'a light rod or wire 11'. The upper arm of the upper bell-crank is connected to the free end of the upper locking-spring 7 by a wire or similar connection 12, and likewise the depending arm of the lower bell-crank 10 is connected to the free end of the lower locking-spring 8 by a wire or similar connection 13.

Now it is evident that by forcing downward on the free end of the lever 9 the free end of the upper spring 7 is drawn out of engagement with the hooked end of the detent or linger 5, while by forcing upward on the free end of said lever 9 the free end of the lower locking-spring 8 will be drawn out of engagement with the hooked end of the depending finger or seat 6. The releasing-lever 9 therefore serves as a common releasing device for both of the locks.

The coperating detents and springs being located at the sides of the window are not exposed to view, and the detents or hooked lingers even when the window is open are entirely out of the way and are so shielded by the window-frame that they are in no way objectionable. The locking devices themselves are incased by the window-frame, where they cannot be reached from the outer side of the window by any kind of tool, and the releas- The free end of this lever projects ing-knobs are so located that they cannot be reached from the outer side of the window without breaking a pane. The advantage of having a lock which will insure the locking of the windows whenever they are closed is obvious.

small cost.

It will of course be understood that the specie construction of the lock may be varied within the scope of the invention herein set forth and claimed. Y

What We claim, and desire to secure by Letters Patent of the United States, is as follows:

l. The combination with a window-frame and upper and lower sash, of independent spring-locks for said two sashes, and a common releasing device for said two locks involving a lever reversely movable from an intermediate position and having connections to the movable members of said locks, substantially as described.

2. The combination with a window-frame, and upper and lower sash, of the hooked detents or fingers 5 and 6 carried respectively by said sashes, locking-springs 7 and 8 secured on the said frame, and coperating respectively with said detents 5 and 6, the re leasing-lever 9 at one side of said frame, the bell-cranks 10 atthe upper and lower corners of said frame, and the connections 1l and 12 connecting said lever 9, bell-cranks 10 and locking-springs 7 and 8, substantially as described.

' In testimonywhereof we affix our signatures in presence of two witnesses.

HARTSON F. WOODARD. BYRON J. DOLPHIN.

Witnesses:

H. D. KILGORE, FRANK D. MERCHANT.

The locks may be applied to windows as usually constructed and at a very- 

